#### Additional Details

See the GitHub issue for more details: https://github.com/kubernetes/kubernetes/issues/112192 

#### Acknowledgements

This vulnerability was reported and fixed by Mark Rosetti (@marosset)


**CVSS Rating:** Low (3.4) [CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C)

- GCE clusters will include some IP ranges that are not used on the public Internet in the list of non-masq IPs. Bumped ip-masq-agent version to v2.3.0 with flag `nomasq-all-reserved-ranges` turned on. ([#77458](https://github.com/kubernetes/kubernetes/pull/77458), [@grayluck](https://github.com/grayluck))

## Changelog since v1.4.0-beta.1

### Other notable changes

* Fix a bug in kubelet hostport logic which flushes KUBE-MARK-MASQ iptables chain ([#32413](https://github.com/kubernetes/kubernetes/pull/32413), [@freehan](https://github.com/freehan))

* Support KUBE_MAX_PD_VOLS on Azure ([#41398](https://github.com/kubernetes/kubernetes/pull/41398), [@codablock](https://github.com/codablock))
* Mark multi-scheduler graduation to beta and then v1. ([#38871](https://github.com/kubernetes/kubernetes/pull/38871), [@k82cn](https://github.com/k82cn))

- Fix a bug that caused to panic the apiserver when trying to allocate a Service with a dynamic ClusterIP and it has been configured with Service CIDRs with a /28 mask for IPv4 and a /124 mask for IPv6 ([#115333](https://github.com/kubernetes/kubernetes/pull/115333), [@aojea](https://github.com/aojea)) [SIG Testing]

* Fix a bug in kubelet hostport logic which flushes KUBE-MARK-MASQ iptables chain ([#32413](https://github.com/kubernetes/kubernetes/pull/32413), [@freehan](https://github.com/freehan))

	* ip-masq-agent is now on by default for GCE ([#47794](https://github.com/kubernetes/kubernetes/pull/47794), [@dnardo](https://github.com/dnardo))

    * In 1.16, the masq-agent daemonset add-on will switch to using `node.kubernetes.io/masq-agent-ds-ready` as a node selector.
* Kubelet: replace `du` and `find` with a golang implementation ([#74675](https://github.com/kubernetes/kubernetes/pull/74675), [@dashpole](https://github.com/dashpole))

- Mark the onPodConditions field as optional in Job's pod failure policy. ([#120204](https://github.com/kubernetes/kubernetes/pull/120204), [@mimowo](https://github.com/mimowo)) [SIG API Machinery and Apps]